One thing to note, as you don't know the exact era: many of the mid-80s ones came with Maillard rear hubs that had the Helicomatic cassettes. I've got a set like that. They're not made anymore, neither is anything compatible, and require a special tool to take off, and some will argue the rear hub is a weaker design not actually suited for touring.
If he wants to keep them, I've got Paselas 1-1/4" tires on my 27" bikes that fit them that I'd recommend. Good all around tire that is reasonably priced.